A very balanced and mature response on the part of John and Martha King, I'd say.
I had something similar happen to me many years ago. I'd just moved into a new flat - maybe 2 days before. On day 3, about 7am there was a very loud knocking on the door, which I opened to reveal maybe a dozen armed police.
It turned out that the previous flat occupant had just gone on the run after holding up a local bank with a shotgun.
Fortunately, they had the chap's photograph, and he looked nothing like me!
Stuff like this does happen occasionally, and clearly in this case once the mistake was spotted, everybody's been very sensible about it - including the local police chief phoning to apologise. If the lessons the Kings put on their website are learned, then more good than harm will have been done by the incident.
Presumably the standard police procedure is based upon the theory that if they ever have to seize an aeroplane, it's probably been hijacked. Possibly a flawed theory.
G